<template>
   <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品添加</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="addForm" :rules="addFromRules" ref="addFormRef" label-width="100px" label-position="top">
            <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_cat">
                        <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps"
                            @change="handleChange" class="shopChoose" expandTrigger="hover"></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <!-- 复选框组 -->
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <el-upload :headers="headersOBJ" action="http://127.0.0.1:8888/api/private/v1/upload" :on-preview="handlePreview"
                        :on-remove="handleRemove" list-type="picture" :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!-- 添加按钮 -->
                    <el-button type="primary" class="shopButton" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
        
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="preDialogVisible" width="50%">
        <img :src="prePath" alt="图片丢失" class="preImg">
    </el-dialog>
   </div> 
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex: "0",
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品所属的分类数组
                goods_cat:[],
                pics:[],
                // 商品详情
                goods_introduce:'',
                attrs:[]

            },
            addFromRules:{
                goods_name:[
                    {required:true,message:'请输入商品名称',trigger:'blur'}
                ],
                goods_price:[
                    {required:true,message:'请输入商品价格',trigger:'blur'}
                ],
                goods_weight:[
                    {required:true,message:'请输入商品重量',trigger:'blur'}
                ],
                goods_number:[
                    {required:true,message:'请输入商品数量',trigger:'blur'}
                ],
                goods_cat:[
                {required:true,message:'请输入选择商品分类',trigger:'blur'}
                ]
            },
            cateList:[],
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            manyTableData:[],
            onlyTableData:[],
            //图片上传请求头
            headersOBJ:{
                Authorization:sessionStorage.getItem('token')
            },
            prePath:'',
            preDialogVisible:false,
            
        };
    },

    created(){
        this.getCateList()
    },
    mounted() {
        
    },

    methods: {
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
            if (res.meta.status!==200) {
                return this.$message.error('获取商品分类列表失败')
            }
            this.cateList = res.data
        },
        // 级联选择器选中项变化触发
        handleChange(){
            console.log(this.addForm.goods_cat);
        },
        beforeTabLeave(activeName,oldActiveName){
            if (oldActiveName!==0&&this.addForm.goods_cat.length!==3) {
                this.$message.error('请填写')
                return false
            }
        },
        async tabClicked(){
            if (this.activeIndex === '1') {
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                if (res.meta.status!==200) {
                    return this.$message.error('获取失败')
                }
                
                res.data.forEach(item => {
                    item.attr_vals=
                    item.attr_vals.length ===0 ? []:
                    item.attr_vals.split(',')
                });
                this.manyTableData = res.data
            }else if (this.activeIndex === '2') {
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if (res.meta.status!==200) {
                    return this.$message.error('获取失败')
                }
                this.onlyTableData = res.data
            }
        },
        // 图片预览
        handlePreview(file){
            this.prePath = file.response.data.url
            this.preDialogVisible = true
            console.log(file);
        },
        // 取消图片
        handleRemove(file){
            console.log(file);
            const filePath = file.response.data.tmp_path
            const i =
            this.addForm.pics.findIndex(X =>{
                X.pic ===filePath
            })
            this.addForm.pics.splice(i,1)
        },
        //监听图片上传成功
        handleSuccess(response){
            const picInfo ={pic:response.data.tmp_path}
            this.addForm.pics.push(picInfo)
        },
        // 点击添加商品
        add(){
            this.$refs.addFormRef.validate(async  valid=>{
                if (!valid) {
                    return this.$message.error('请填写必要的表单项')
                }
                //添加的功能
                const form= _.cloneDeep(this.addForm)
                form.goods_cat=form.goods_cat.join(',')
                //动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(',')}
                    this.addForm.attrs.push(newInfo)
                })
                //静态属性
                this.onlyTableData.forEach(item=>{
                    const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                console.log(form);
                //发起请求添加商品     商品名称必须是唯一的
                const {data:res}= await this.$http.post('goods',form)
                if (res.meta.status !==201) {
                    return this.$message.error('添加失败!')
                }
                this.$message.success('添加成功')
                this.$router.push('/goods')
            })
        }   
    },
    computed:{
        cateId(){
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
};
</script>

<style lang="less" scoped>
.shopChoose{
    width: 200px;
}
.el-checkbox{
    margin: 0 8px 0 0!important;
}
.preImg{
    width: 100%;
}
.shopButton{
    margin-top: 15px;
}
</style>